fourstarr deals USB Dock Wall Charger + 2X 2100mAh replacement Spare Batteries for Samsung Galaxy S3 i9300, L710, i747, i545, T999 Tested under strict quality control standards. CE and ROHS certified 2100mAh battery allows you to store power necessary to keep your device charged throughout the day Built-in IC chip prevents overcharging. Guaranteed to fit your phone Package contents: 1 USB Dock Charger + 2x S3 batteries